Car-door



S. T. WALKUP.

CAR DOOR.

APPLICATION FILED SEPT. 6, I9I9,

Patentad May 2491923.

2 SHEETS-SHEET l.'

S. T.WALI UP.

CAR DOOR.

APPLICATION FILED SEPT. 6, 1919.

Iazente May 2% 2 SHEETS-SHEE ITI/ff MWWQIM.

. .i number of ears conerolled by a. single .Appleaton le September ii,1919.

To all whom t may concern.'

Be it known eher i, SAMUEL Tziorms IALnUP, a citizen or" the UnitedStates oi America, residingy et 875 Viest 180th street, city of NewYork, borough oi' iveninit'izan, n.

Biete of New York5 have invented new useful Improvements in CarLDooi-s,of which the foliowing is e speeiieetien.

This invention relates to u eonrol system for passenger oar doors,having more pertienler reference to an eieetrieelleontrol systern, andbeing: intended more parieularly for application to city transit trainssuoli es subway ory elevated trains.

The invention has for u general. object provide en improved andsimplified Control system whereby ehe doors of pl wility of cnrs may beoperated in unison, l ing the number of guards required. on enen min.

More speoieelly speaking die in'ven"".on has for an object to provide econt-rol sysi whereby the platform men el: swr' may operate the doors,and Wi'iere forni man may be varied as desired.

For :turther compneiiension of the inv n.- Jsion, end of the obgects andadvantages ltliereo', reference will be lied to the followingdescription. and accompanying drawings, and-to the appended claims inwhich the various novel features of the invention are more particularlyset forth.

Figure of the drawings is e side eieverion of :i port-ion of n iruinadapted. ro ioe oon- 'rolled oyiny stein, indicn'cing` iiy 1n engagementwith the cooperating station. ewig nient.

Fig. 2 is e diagrammatic. the electrical connections.

Fig. 3 is an enlarged end elevaaion, indieating also e portion. of thestation.

7Fig. Li is e detail side elevation of `the een-- tact member carried bythe trein showing also a portion of tlie fixed station Contact withwhich it engages.

Fig.' 5 is a. fragmentary detail indicating *une door operating means.

Fi 6 is o detail horizon'ia View oic ne ControlA adjustment device.

in the drawings the reference numeral i View showin indicates in generala. passenger cer sucn :LS

s in common use in underground city transit systems Winch eregenerali;L7 known sub- Speeeaion o Letters Patent.

our trein. '2 and iii-.e are iin il e pre vided on @een si end door@ 5.f preeise ineens fern-is ne impro ro any medien purposes of dooropere?. :in air fin 19 renrns bi1 iioiding 'he open, wi the door removediro Wy inp lill cient fiis'iianoe from each mii.. wires lend o rWiiioii.. nie-V be carrying i the number of contact rails. Each of theseWires terminates in loose portion 29 carrying a plug 3,0 adapted to eage in any of the sockets. F rom 'these blrs wires 31' lead through abattery 32, or other source of .power, and switches 33 to' ground.

" Carried by each car isla contact member adapted to engage a selectedone of the rails 2l when the train comes to a stop, this contact memberhere comprising a wheel 35 journaled in a yoke 36 fixed on the, upperend of a pin 3'? which is slidably mounted in a bracket 38 carried bythe car, -a spring 39 normally pressing the wheel upward While a collar420 on the pin limits the upward movement.' From these contact members'wires 4:1 lead to one terminal of each solenoid l0 while from theopposite terminais of the solenoids :wires 42 lead to ground. lvlherethe doors onrfopposite'sides have to beqrequired toghe alternatelyopened in the course of a run I preerablyprovide a pair of these contactmembers spaced site sides ci the car as shown in Fig. 2 and arrange therailsl at the different stations accordingly. Where the doors"` on oneside only are opened during the entire run a switch may he provided toswitch the contacts from one set of door control devices to the other atthe end of the run.

The operation is as follows: rlhe switches 33 will be located atsuitable points on the statica platform and the wires 24 will lead 4inlgroups to the 'different bars 27 accord'- ing to which section or' thetrain .is to have its doors controlled from each individualswitch. inthe present instance the three cars at one end are controlled by oneswitch, four center cars by the second switch, and the three cars at theother end by the third switch. The wires 24 as will be seen, lead ingroups ot' three, four and three to the .respective bars 27.

The motorman will bring the train to a stop at a position to have eachwheel contact in engagement with the proper rail and when either of theswitches is closed the current will iiow through the solenoids oil thegroup o't cars which are in contact with the rails connected to the barwith which that particular switch is connected. `When the switc openedthe springs bring the door operating; devices to normal position wit thedoors closed.

lt will be apparent of course that by changing the grouping of the wiresupon the bars the number of oars whose doors are controlled by anindividual switch may the number the bars 26, together with on oppol edto come to rest, car door operating means,

means for electrically controlling said car door` opeating means,including a contact member on the car vadapted to engage the said rail,and a` hand Switch adapted for mounting on a stationary part independentof the car.

2. ln a car door control system for trains, a plurality 01"' contactrails under ywhich the cars are adapted to come to rest, electri` callycontrolled car door operating' means including' a contact member foreach car adapted to engage a selected one of said rails when the car isat restr a plurality ot' hand switches, and means whereby a closedcircuit through a source ot' power may be established through either ofsaid switches and diii'er'ent lgroups of said rails7 said meansincluding' the electrical control means of'the cars whose beforementioned Contact members are engaging the rails of the said groups.

3. In a car door control system for trains,' a plurality ot' conta-ctrails under which the cars are adapted to come to rest. electricallycontrolled car door operating means including a contact member for eachcar adapted to engage a selected one of said rails when the car is atrest, a plurality ot hand switches.y and means whereby a closed circuitthrough a source ot power may he established through either ot saidswitches and different groups of said rails, said means including' theelectrical control means of the cars whose before mentioned dontactmembers are engaging the rails ofthe said group, and means whereby thenumber ot cars in a group may bc raried.

4. ln a car door control system for trains, a series of contact railsadjacent which the cars are adapted to come to rest, electril Uil callycontrolled car door operating means9 Y Ti'OMAS WALKUP.

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